JPH06282235A - Internally illuminated display device - Google Patents

Abstract

PURPOSE:To keep a displayed character or design distinct even in the background lighting space of high brightness equal to or above 1,000 luxes as in a store, a department store or a hotel, and effectively produce lighting environment space via the change of the character or the design. CONSTITUTION:A relationship between ultraviolet illuminance EUX and a brightness ratio RB is shown by a graph with a visible ray illuminance ELX kept constant at the prescribed value. Also, the result of evaluation regarding the degree of distinctness of each of panels A, B and C obtainable from the change of the illuminance ELX and brightness EUV is superimposed on the graph. As a result, the lower limit for acceptance at the brightness ratio RB is 2.5. When an acceptance range at the illuminance EUV of 1,000muW/cm<2> (approximately 16%) or above is examined, all data with background lighting illuminance set at 1,400 luxes is acceptable, provided that the visible ray illuminance ELX is approximately equal to 75% or above, namely approximately 5,000 luxes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an internally lit display device to be displayed in shops, department stores, hotels and the like, and more specifically to visible light by making an ultraviolet coloring phosphor carried on the surface of the display develop color. The present invention relates to an internally-lit display device that enables a display different from that when a display is displayed only by irradiation.

[0002]

2. Description of the Related Art Heretofore, various display devices have been known in which an ultraviolet ray-emitting phosphor, which emits a color when irradiated with ultraviolet rays, is applied to a surface panel plate.

For example, as an advertisement display for nighttime use in restaurants, karaoke boxes, etc., characters and patterns are drawn on the surface panel plate surface of the display by using an ultraviolet coloring phosphor.
It is known that the panel plate surface is irradiated with ultraviolet rays from the outside so that these letters and patterns are fluorescently colored so as to attract the attention of passers-by.

Such a display is generally referred to as an externally illuminated display, and is used as a nighttime display as described above, which is sufficient if an illuminance on the plate surface of about 30 lux can be obtained.

On the other hand, in recent years, there has been a demand for a display for effectively producing a light environment space in a background illumination space of 1000 lux or more, such as in a department store or a hotel lobby.

[0006] Such a display needs to be a so-called internally illuminated display capable of increasing the illuminance of ultraviolet rays to the ultraviolet-emitting phosphor.

Techniques relating to the construction of this type of internal lighting display are disclosed in Japanese Patent Laid-Open No. 4-368988, Japanese Utility Model Laid-Open No. 51-140086, Japanese Utility Model Laid-Open No. 63-168482, and the like.

For example, the technique disclosed in the above-mentioned Japanese Patent Laid-Open No. 4-368988 discloses that a white fluorescent pigment layer that emits colored light under ultraviolet light is uniformly formed on the back surface of a transparent positive image carrying a motif, and this back surface side An ordinary fluorescent lamp and an ultraviolet fluorescent lamp are provided in the so that the display mode of the motif can be changed between when the ordinary fluorescent lamp is used and when the ultraviolet fluorescent lamp is used.

[0009]

Incidentally, although the techniques described in the above-mentioned publications show the device configuration of the internal illumination type display, in any case, the intensity of the ultraviolet ray for irradiating the ultraviolet ray-emitting phosphor is mentioned. Not not.

However, as described above, in an internally-illuminated display used under high-illumination background illumination, the illuminance due to the built-in light source necessary to make the display contents of this display stand out is the illuminance due to the background illumination on the display. It depends on the relative relationship with.

That is, under bright background illumination, the display function cannot be effectively exhibited unless the intensity of visible light or ultraviolet rays from the built-in light source is increased accordingly.

In particular, as described above, when it is attempted to form a light environment space in a department store or a hotel lobby, etc., the relationship with the illuminance due to the background illumination on the display becomes delicate, and the built-in light source Setting the intensity and the like in relation to the background illumination is a key point for effectively producing the light environment space.

The present invention has been made in view of the above circumstances, and makes a displayed motif stand out even in a background illumination space having a high illuminance of 1000 lux or more such as in a store, a department store, or a hotel. In addition, it is an object of the present invention to provide an internally illuminated display device that can effectively produce a light environment space by changing these motifs.

[0014]

A first internally-illuminated display device of the present invention is a translucent or semi-translucent plate-shaped member carrying an inorganic phosphor that emits light when irradiated with ultraviolet rays, and a motif. A translucent film formed with and a translucent plate-like body that protects the translucent film in this order from the back surface side to the front surface side, and a back surface side of the laminated body. An internally lit display device comprising a visible light lamp and an ultraviolet lamp that are arrayed and held, and a container that engages with the laminated body to form a box and that houses the visible light lamp and the ultraviolet lamp therein. The illuminance E _LX of visible light from the visible light lamp is 5000 lux or more and the illuminance E _{UV of UV} light from the ultraviolet lamp is 1000 μW / cm ² or more on the back surface of the plate-shaped body carrying the phosphor. Like, and said protection Of the emission luminance of the motif on the surface of the plate-like body when lit the visible light lamp and an ultraviolet lamp, the value R _B divided by the motif of the luminance due to the background illumination of the device on the surface 2.
It is characterized in that the outputs of the visible light lamp and the ultraviolet lamp are set so as to be 5 or more.

In the second internally illuminated display device of the present invention, a light-transmitting or semi-light-transmitting plate-like member carrying an inorganic phosphor that emits light when irradiated with ultraviolet rays and a motif are formed. A translucent film and a translucent plate-like body for protecting the translucent film are laminated in this order from the back surface side to the front surface side, and arranged and held on the back surface side of the laminated body. An internal lighting display device comprising a visible light lamp and an ultraviolet lamp, and a housing that engages with the laminated body to form a box and accommodates the visible light lamp and the ultraviolet lamp inside, and carries the phosphor. Illuminance E of ultraviolet rays from the ultraviolet lamp on the back surface of the plate-shaped body
The emission brightness of the motif when the visible light lamp and the ultraviolet lamp are lit on the surface of the protective plate so that the _UV is 1000 μW / cm ² , and the background of the device on the surface is the divided by the brightness of the motif by lighting R _B, when the variation rate of the illuminance E _LX of the visible light was R _LX, value the value R _B is divided by the variation rate R _LX is 9 or more As described above, the outputs of the visible light lamp and the ultraviolet lamp are set.

It is to be noted that the ultraviolet lamp may be a so-called black light as long as it can irradiate near ultraviolet rays (300 to 400 nm) as a result, and it may be a light source which emits visible light in addition to ultraviolet light. A light cut filter may be added.

The above-mentioned translucency or semi-translucency means
It is transparent or semi-transparent to not only visible light but also near-ultraviolet light.

[0018]

According to the first internally illuminated display device,
Specifies the lower limit of the illuminance of visible light and ultraviolet light from the built-in light source on the back surface of the phosphor-supported plate, and lights the above-mentioned built-in light source against the brightness of the motif by background illumination on the surface of the plate for protection. The lower limit value of the emission luminance ratio R _B of the motif on the surface at that time is defined.

Next, according to the second internally-illuminated display device, the lower limit of the illuminance of visible light from the built-in light source on the back surface of the plate carrying the phosphor is defined, and the illuminance of the ultraviolet light is further defined. The ratio R _B to the fluctuation ratio R _LX of
Stipulates the lower limit of the ratio of.

These lower limit values are derived from the data as will be described later obtained by the inventors of the present invention through repeated experiments, and the values are set in a display device in a background illumination space of 1000 lux or more. It shows the lower limit of the range in which the display contents of the display can be made conspicuous when is set.

Therefore, according to the above-described internally illuminated display device of the present invention, the characters and patterns displayed on the display can be conspicuous even in the background illumination space of high illuminance of 1000 lux or more, It is possible to effectively produce a light environment space by changing these characters and patterns.

[0022]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 3 shows an interior lighting display device 13 according to an embodiment of the present invention, which is a rear wall surface 12 of a reception set 11 in a reception room.
It shows the situation when it is arranged as a wall-mounted display.

The inside of the internally illuminated display device 13 is constructed as shown in the sectional view of the device in FIG. That is,
The display surface of this device is a translucent film (Corton film) 20 on which a motif consisting of letters and patterns is printed, and the translucent film 20 is arranged inside the translucent film 20.
Superimposing a transparent resin plate 24, which is formed by coating the ultraviolet-emitting phosphor 22 at a predetermined position on the back surface, and a transparent resin plate 26, which is arranged outside the translucent film 20 and protects the film 20, with each other. It is formed by. In addition, a plurality of ultraviolet fluorescent lamps (black light; BLB) 28 and visible light fluorescent lamps (daylight;
L) 30 are arranged so as to be alternately arranged, and further, the back side and the side of each of these lamps 28, 30 are so arranged that all the light from each of these lamps 28, 30 is applied to the surface portion. A reflector 32 is arranged on the other side. Further, the lamps 28 and 30 and the reflection plate 32 are engaged with the surface portion.
A light-shielding box 34 for housing the inside is provided.

Next, FIG. 5 shows the arrangement of lamps inside the apparatus when the above-mentioned surface portion is removed.

According to FIG. 5, this display device
The above BLB 28 and D extending over substantially the entire width of 13 in the left-right direction
L30s are alternately arranged in the vertical direction at substantially equal intervals.

A socket 40 is provided at each end of each BLB 28 and each DL 30, and an electronic ballast 42 corresponding to each BLB 28 and DL 30 is provided at an upper end portion and a lower end portion of the device.

According to this internally illuminated display device 13,
When the BLB 28 is turned on, the ultraviolet light-emitting phosphor 22 applied to the transparent resin plate 24 is colored to form a motif having a different impression from the motif printed on the back surface of the translucent film 20 which is displayed when the DL 30 is turned on. can do.

Therefore, a plurality of motifs having different impressions can be displayed on one panel by alternately turning on the BLB 28 and the DL 30 or changing the illuminance ratio of ultraviolet rays and visible light from each.

The translucent film 20 may be made of translucent resin such as polyester, acryl, PVC or the like, and a translucent glass plate may be used instead.

The motifs such as letters and patterns formed on the translucent film 20 may be formed by printing as described above, or by using a photographed image carried on a photographic film (transparent positive image), It is also possible to form it by drawing a paint on the film.

A transparent glass plate can be used as the transparent resin plate 24, and a semitransparent resin or glass plate can be used in place of these.

Further, the ultraviolet light-emitting phosphor 22 may be applied on the back surface of the transparent resin plate 24 as a paint, or may be printed on the back surface of the transparent resin plate 24 as an ink. Alternatively, the transparent resin plate 24 may be kneaded into the inside to form a kneading sheet as a whole. Further, the ultraviolet color-emitting phosphor 22 may be applied or printed on a transparent sticker, and the transparent sticker may be attached to the back surface of the transparent resin plate 24.

As the UV-coloring phosphor 22, a white inorganic phosphor that emits fluorescence of a predetermined color when irradiated with UV rays is used. Specific examples of this white inorganic phosphor are shown below.

(1) Blue light emitting phosphor Sr ₂ P ₂ O ₇ : Eu 3 (Ba, Ca, Mg) ₃ (PO ₄ ) _2. (Ba, C
a, Mg) Cl ₂ : Eu 3 (Ba, Mg) O.8Al ₂ O ₃ : Eu ZnS: Ag (2) Green light emitting phosphor ZnS: Cu, Al (Zn, Cd) S: Cu, Au, Al Zn ₂ SiO ₄ : Mn Zn ₂ GeO ₄ : Mn (3) Red light emitting phosphor Y ₂ O ₃ : Eu YVO ₄ : Eu Y ₂ O ₂ S: Eu In addition to the above (1), (2) and (3). A phosphor emitting a desired fluorescent color (including white) can be obtained by mixing the phosphors shown in an appropriate ratio.

Further, in order to develop the color when the DL 30 is turned on, it is possible to knead an organic pigment as a colorant into the white inorganic phosphor or to coat it on the translucent film 20.

Specific examples of the organic pigment as the colorant are shown below.

(1) Cyanide (C) Phthalocyanine colorant (2) Yellow (Y) Hansa yellow, naphthol yellow, azo colorant (3) Magenta (M) permanent red, quinacridone, azo colorant Color Matching Material In addition, a pigment of a desired color can be obtained by mixing the colorants described in (1), (2) and (3) above in an appropriate ratio.

Further, examples of compositions of these white inorganic phosphors in the case of being used in the form of ink, paint or kneaded with resin are shown below.

(1) Acrylic inorganic phosphor ink a. Acrylic resin varnish 100 parts by weight b. Inorganic phosphor pigment 5 to 300 parts by weight c. Dispersant 0.01 to 20 parts by weight d. Thinner 1 to 50 parts by weight (2) urethane-based inorganic phosphor coating a. Urethane resin binder 100 parts by weight b. Inorganic phosphor pigment 5 to 400 parts by weight c. Dispersant 0.01 to 20 parts by weight d. Thinner 1 to 50 Parts by weight (3) Vinyl-based resin kneading sheet a. Vinyl chloride resin 100 parts by weight b. Inorganic phosphor pigment 0.5 to 200 parts by weight c. Plasticizer 1 to 200 parts by weight Next, the internally illuminated display shown in FIG. Using device 13a,
The back surface of the display panel 50, a visible light illuminance E _LX from ultraviolet illuminance E _UV and DL30 was in each case when each is varied in four stages from BLB28, 3 kinds of panels A,
An evaluation test of how conspicuous B and C are will be described.

The internally lit display device 13a has substantially the same structure as the device 13 shown in FIGS.

Further, as shown in FIG. 6, the power from the power source 52 is passed through the dimmer A54 and the ballast A56 to each BLB28.
To each DL30 via a dimmer B58 and a ballast B60.
Is supplied to.

[0043] Further, in performing this evaluation test, ultraviolet illuminance E _UV from the BLB28 is the case of 6400μW / cm ² is 100%, after which the 75%, 50% and 25% stepwise The visible light illuminance E _LX from the DL 30 is set to 100% at 7200 lx, and then gradually changed to 75%, 50% and 25%.

On the other hand, the background illuminance on the surface of the panel 50 is set to 1400 lx, and the brightness of each panel A, B, C on the surface by this background illumination is 160 cd / m ² , 14 respectively.
It is set to 0 cd / m ² and 30 cd / m ² .

Further, the motifs of panel A at the time of visible light irradiation and ultraviolet light irradiation are shown in FIG. 7 (A) and FIG. 7 respectively.
Similarly, the motif of panel B is shown in FIG. 8 (A).
Similarly, the motif of panel C is shown in FIG. 9 (A) and FIG. 9 (B), respectively.

Under the conditions described above, the luminous brightness values of the motifs of panels A, B, and C when the visible light illuminance E _LX and the ultraviolet illuminance E _UV are changed are shown in Tables 1, 2, and 5, respectively.
3 shows. However, the emission brightness is measured on the surface of the panel 50, and the measured emission brightness includes that due to background illumination.

[0047]

[Table 1]

[0048]

[Table 2]

[0049]

[Table 3]

Next, Tables 4, 5 and 6 show the emission luminance values for each of the panels A, B and C excluding the emission luminance values shown in the above-mentioned tables excluding those due to background illumination. That is, the values shown in Table 4 are 160 times the values shown in Table 1.
Each value shown in Table 5 is obtained by subtracting 140 from each value shown in Table 2, and each value shown in Table 6 is obtained from each value shown in Table 3 by 30. Is subtracted.

[0051]

[Table 4]

[0052]

[Table 5]

[0053]

[Table 6]

Next, the visible light illuminance E _LX and the ultraviolet illuminance E
Luminance ratio obtained by dividing the light emission luminance of each panel A, B, C (excluding the one caused by background illumination) by the light emission luminance of each panel A, B, C only by the background illumination when _UV is changed. The values (R _B ) are shown in Tables 7, 8 and 9, respectively. That is, each value shown in Table 7 is obtained by dividing each value shown in Table 4 by the emission luminance 160 of the background illumination of panel A, and each value shown in Table 8 is obtained by dividing each value shown in Table 5. The light emission luminance 140 of panel B due to the background illumination is divided, and the respective values shown in Table 9 are the respective values shown in table 6 divided by the light emission luminance 30 of the background illumination of panel C.

[0055]

[Table 7]

[0056]

[Table 8]

[0057]

[Table 9]

Next, when this on the basis of the respective values shown in Table 7, 8, 9, to fix the ultraviolet illuminance E _UV to a predetermined value,
A graph _showing the relationship between the visible light illuminance E _LX and the luminance ratio R _B is shown in FIG.
Shown in. Here, FIG. 1 (A), (B) , (C), (D) each of the ultraviolet illuminance _{E UV 100% ,, 75%,} 50%, 25%
Shows the relationship when fixed to.

Further, based on the respective values shown in Tables 7, 8 and 9, when the visible light illuminance E _LX is fixed to a predetermined value, the relationship between the ultraviolet illuminance E _UX and the luminance ratio R _B is graphed. 2 shows. Here, FIGS. 2A, 2B, 2C and 2D show the relationship when the visible light illuminance is fixed to 100%, 75%, 50% and 25%, respectively.

Next, the visible light illuminance E _LX and the ultraviolet illuminance E
Two evaluators evaluated the conspicuousness of each panel A, B, and C when _UV was changed, and the results are shown in Tables 10, 11, and 12, respectively.
Shown in.

[0061]

[Table 10]

[0062]

[Table 11]

[0063]

[Table 12]

Here, when it was evaluated that it was conspicuous, a mark of ◯ was given, when it was evaluated as slightly conspicuous, it was marked with Δ, and when it was evaluated that it was not conspicuous, it was marked with x.

2 points for ○ mark, 1 point for Δ mark, 0 for × mark
Points are given, the evaluation points of two evaluators are added in each case, and if the result of addition is 2 points or more and it is regarded as a pass in terms of prominence, the lower limit of the pass is from FIG. 1 and FIG. Obviously, the brightness ratio R _B is 2.5. Also,
Straight of each graph in Figure 2 extend outwardly, ultraviolet illuminance E _UV
When the visible light illuminance E _LX is about 75% or more, that is, about 5000 lx or more, all the data are acceptable when the pass range is 1000 μW / cm ² (about 16%) or more.

As a result, the visible light illuminance E _LX is 5000 lx.
As the ultraviolet illuminance E _UV is 1000μW / cm ² or more, and the luminance ratio is 2.5 or more than BLB28 and DL
If the intensity of 30 is adjusted, it is possible to effectively produce a light environment space using the above display display even in a background illumination space with a high illuminance of 1000 lx or more.

The slope a of each straight line representing the relationship between the luminance ratio R _B and the visible light illuminance E _LX shown in FIG.
The values obtained for B and C are shown in Table 13. Each value in Table 13 is a value obtained by multiplying the actual slope of the above straight line by 100, since E _LX is expressed as a percentage.

[0068]

[Table 13]

[0069] Here, extending a line of each graph in Figure 1 outwardly, when the ultraviolet irradiance E _UV is seen as considering the adequate range at the time of the above 1000μW / cm ² (about 16%), Panel B
All data for The inclination a (× 100) in panel B is 9 or more.

[0070] As a result, the ultraviolet irradiance E _UV is 1000W
/ Cm ² or more and visible light illuminance E _LX - as luminance values R _B linear gradient a (× 100) is 9 or more BLB28 and D
By adjusting the intensity of L30, it is possible to effectively produce a light environment space by using the above display display even in the background illumination space of high illuminance of 1000 lx or more.

The internal lighting display device of the present invention is not limited to that of the above embodiment, and various other modifications can be made.

For example, the size of the device may be any size, and the size may be large enough to cover the entire wall surface of the hotel lobby.

The numbers and shapes of the visible light lamps and the ultraviolet lamps can be appropriately selected according to the size and shape of the display device. Further, the lamp in this case is not limited to the fluorescent lamp.

[0074]

As described above, according to the device of the present invention, the visible light illuminance and the ultraviolet light illuminance are such that the display is prominent in the background illumination space in which the device is arranged and the background illuminance is 1000 lux or more. Since the intensities of the visible light lamp and the ultraviolet lamp are set as described above, it is possible to effectively produce the light environment space even in a background illumination space of high illuminance such as in a department store or a hotel lobby.

[Brief description of drawings]

FIG. 1 is a graph showing a visible light illuminance-luminance ratio straight line based on data obtained by an evaluation test.

FIG. 2 is a graph showing an ultraviolet illuminance-luminance ratio straight line based on data obtained by an evaluation test.

FIG. 3 is a schematic view showing a situation in which the internally illuminated display device according to the embodiment of the present invention is a wall-hanging type for a reception room.

4 is a cross-sectional view showing the inside of the device shown in FIG.

5 is a plan view showing the inside of the apparatus shown in FIG.

FIG. 6 is a block diagram showing an outline of an apparatus used for performing an evaluation test.

FIG. 7 is a schematic diagram showing the motif of panel A.

FIG. 8 is a schematic diagram showing the motif of panel B.

FIG. 9 is a schematic diagram showing the motif of panel C.

[Explanation of symbols]

 13,13a Internal display device 20 Translucent film 22 UV coloring phosphor 24,26 Transparent resin plate 28 UV fluorescent lamp (BLB) 30 Visible fluorescent lamp (DL) 32 Reflector 34 Translucent box

Front page continuation (72) Inventor Sadayasu Miyahara 2-9-23, Zengyozaka, Fujisawa-shi, Kanagawa Prefecture (72) Inventor Yozo Nishiguchi 1403, Matano-cho, Totsuka-ku, Yokohama-shi Kanagawa 11-104

Claims (2)

[Claims] 1. A translucent or semitranslucent plate-like body carrying an inorganic phosphor that emits light when irradiated with ultraviolet rays, a translucent film having a motif formed thereon, and protecting the translucent film. And a translucent plate-shaped body in this order from the back side to the front side, a visible light lamp and an ultraviolet lamp arranged and held on the back side of the laminated body, and the laminated body. In an internally illuminated display device, which comprises a housing that houses the visible light lamp and the ultraviolet lamp inside, forming a box body, the visible light lamp on the back surface of the plate-shaped body carrying the phosphor. The illuminance E _LX of visible light from the above is 5000 lux or more and the illuminance E _{UV of the UV} from the ultraviolet lamp is 1000.
The luminous brightness of the motif when the visible light lamp and the ultraviolet lamp are lit on the surface of the protective plate-like member is set to μW / cm ² or more, and the background illumination of the device on the surface is set. The output of the visible light lamp and the ultraviolet lamp is set so that the value R _B divided by the luminance of the motif according to the above is 2.5 or more. 2. A translucent or semi-translucent plate-like body carrying an inorganic phosphor that emits light upon irradiation with ultraviolet rays, a translucent film having a motif formed thereon, and protecting the translucent film. And a translucent plate-shaped body in this order from the back side to the front side, a visible light lamp and an ultraviolet lamp arranged and held on the back side of the laminated body, and the laminated body. In an internally lit display device comprising a housing body that houses the visible light lamp and the ultraviolet lamp inside, in a box body, and on the back surface of the plate-shaped body carrying the phosphor, from the ultraviolet lamp. of such illuminance E _UV ultraviolet is 1000μW / cm ^2, and the emission luminance of the motif when lit the visible light lamp and an ultraviolet lamp on the surface of the plate-like body for the protection, on the surface In the The value obtained by dividing the brightness of the motif by background illumination device R _B, wherein when the variation rate of the illuminance E _LX visible light was R _LX, value the value R _B is divided by the variation rate R _LX 9 An internally lit display device, characterized in that the outputs of the visible light lamp and the ultraviolet lamp are set as described above.